[Scorpiion]

This is a good idea, I got tempted to try this. Found this page on their homepage (in Swedish): https://www.klarna.com/se/dataskydd/

Where it says you can email this address "[e-mail]" if you either want them to delete your data (except data they are required to store as a bank) or if you want a print out of your personal information they store.

The matching UK site (in English) is here: https://www.klarna.com/uk/privacy-policy/ and has this email for the same purpose: "[e-mail]"